I'm sure that with some collaboration, we will be able to fix the rendering of pictures in the poppler library, after which the switch to use 8bit grey internally is a logical one.
I merely wanted to point out to the others that it might be a little longer before this turns up in a release version, we need to fix the issue with images first.
That being said, I will send Scotty some more info via email. Just in case he gets bored this weekend